QOJ.ac

QOJ

Time Limit: 2 s Memory Limit: 2048 MB Total points: 100
Statistics

题目描述

给定两棵有根树 $T_1, T_2$,其中根节点为 $1$ 号点。你需要判定 $T_1, T_2$ 在无标号意义下是否同构。

输入格式

每个测试点中包含多组测试数据。

输入的第一行包含一个整数 $T$,表示数据组数。对于每组数据:

输入的第一行包含一个整数 $n$。

接下来 $n-1$ 行,每行两个整数 $(u,v)$,描述 $T_1$ 中的一条边。

接下来 $n-1$ 行,每行两个整数 $(u,v)$,描述 $T_2$ 中的一条边。

输出格式

对于每组数据,若 $T_1, T_2$ 同构,输出 Isomorphism,否则输出 No

样例数据

样例输入

5
3
1 2
1 3
1 2
2 3
3
1 2
1 3
1 3
1 2
4
1 2
2 3
2 4
1 4
4 2
4 3
4
1 2
2 3
3 4
1 2
2 3
2 4
5
1 2
1 3
2 4
2 5
1 4
1 5
2 5
3 5

样例输出

No
Isomorphism
Isomorphism
No
Isomorphism

子任务

对于所有数据,$1 \leq n \leq 10^5, 1 \leq \sum n \leq 10^6$。

Discussions

About Discussions

The discussion section is only for posting: Editorials, General Discussions (problem-solving strategies, alternative approaches), and Off-topic conversations.

This is NOT for reporting issues! If you want to report bugs or errors, please use the Issues section below.

Open Discussions 0
No discussions in this category.

Issues

About Issues

If you find any issues with the problem (statement, scoring, time/memory limits, test cases, etc.), you may submit an issue here. A problem moderator will review your issue.

Guidelines:

  1. This is not a place to publish discussions, editorials, or requests to debug your code. Issues are only visible to you and problem moderators.
  2. Do not submit duplicated issues. Submitting multiple issues may cause your account to be banned.
  3. Issues must be filed in English or Chinese only.
Active Issues 0
No issues in this category.
Closed/Resolved Issues 0
No issues in this category.